Chinese Marine Propulsion

ACuriousPLAFan

Brigadier
Registered Member
Besides the short paragraph, there is a lineup of gas turbine engine products by CSSC's 703rd Institute listed on the presentation screen. From smallest to largest:
- CGT3
- CGT6
- CGT8
- CGT12
- CGT16
- CGT25
- CGT28
- CGT30
- CGT40
- CGT50
With a partially photographed chart of the names of the gas turbines and their respective power outputs. The digits in the names corresponds to their listed power outputs.

Based on the information on the CGT30 in my previous post, is it assumed/expected that the listed power outputs for each of the engines are based on ISO standards (15°C temperature, sea level atmospheric pressure, 0% relative humidity, no inlet/exhaust loses).

Some correction - After looking back, I believe that those aforementioned power output values indicated in the names of those gas turbine engines are likely to be based on the US Navy Standard Day Condition (~38°C temperature, sea level atmospheric pressure, 60% relative humidity, ~2–6 inch H₂O (~500-1500 Pa) inlet/exhaust loses) instead of the ISO Standard Condition.
 
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Tomboy

Junior Member
Registered Member
What would QC-500 be used on though, two of these could power a 055 replacement(ie. next generation CG/large DDG) while one of these could power a general-purpose destroyer like the speculated 9000-ton class destroyer although I'm not sure how good of an idea it is to power your ship with a single large turbine as if you lose that you *don't* have anything left. So, I assume next gen general DDG would still go with 2 smaller gas turbines which really only leaves next generation CG/large DDG, modified 076 and hypothetical conventional carrier.
 

latenlazy

Brigadier
What would QC-500 be used on though, two of these could power a 055 replacement(ie. next generation CG/large DDG) while one of these could power a general-purpose destroyer like the speculated 9000-ton class destroyer although I'm not sure how good of an idea is to power your ship with a single large turbine as if you lose that you *don't* have anything left. So, I assume next gen general DDG would still go with 2 smaller gas turbines which really only leaves next generation CG/large DDG, modified 076 and hypothetical conventional carrier.
Depends on electrical power requirements for future vessels too.
 

tphuang

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Depends on electrical power requirements for future vessels too.

yeah, let's wait and see what the future requirements look like. I could imagine laser weapon system being a huge requirement. And of course, latest GaO radar + cooling will be huge energy consumers. One good thing is that with the incorporation of IEPS and shipboard battery, the energy efficiency gets a lot better for future vessel.
 

ACuriousPLAFan

Brigadier
Registered Member
What would QC-500 be used on though, two of these could power a 055 replacement(ie. next generation CG/large DDG) while one of these could power a general-purpose destroyer like the speculated 9000-ton class destroyer
So, I assume next gen general DDG would still go with 2 smaller gas turbines which really only leaves next generation CG/large DDG, modified 076 and hypothetical conventional carrier.

There are the CGT-30M, CGT-40M and QC400 marine gas turbine engines with smaller power outputs than the QC500 (and also CGT-50M in the future) that can be used for propelling and/or powering general-purpose DDG-sized warships.

For instance, the Arleigh Burke DDGs have 4x LM2500s with an individual propulsion power output of ~19.57 MW (under USN SD conditions), meaning a combined propulsion power output of ~78.28 MW in COGAG configuration.

On a hypothetical/future general-purpose DDG in the PLAN with similar size and displacement as the Arleigh Burke DDG, the same propulsion power output demand can be met with 2x CGT-30Ms or 2x CGT-40Ms, supplemented by several 4-6 MW diesel/diesel-electric engines in CODAG/CODLAG or CODOG/CODLOG configurations.

although I'm not sure how good of an idea it is to power your ship with a single large turbine as if you lose that you *don't* have anything left.

There are plenty of FFGs which feature only one gas turbine engine per boat. The Mogami, Constellation and FREMM-classes of FFGs are prime examples.

Of course, this sole high-power gas turbine engine are working in addition to several diesel (or diesel-electric) engines onboard these types of warships in CODAG/CODLAG or CODOG/CODLOG configurations.

The sole gas turbine engine is used mainly during high-speed dashes, whereas the diesel (or diesel-electric) engines are used for low-speed cruising (which is often the majority portion of most journeys at sea). That means in case the sole gas turbine engine is rendered inoperable, the warship can still rely on its onboard diesel/diesel-electric engines to return to base.
 
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ACuriousPLAFan

Brigadier
Registered Member
One of the two news on nuclear marine propulsion from SOYO on Weibo.

Another new nuclear-powered ship will be constructed in the south (which I should be Jiangnan Shipyard, based on past developments). However, said warship is likely to be of civilian nature (i.e. non-military).

Nuclear-powered icebreaker, maybe?

20250619_194612.jpg
 
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sunnymaxi

Major
Registered Member
One of the two news on nuclear marine propulsion from SOYO on Weibo.

Another new nuclear-powered ship will be constructed in the south (which I should be Jiangnan Shipyard, based on past developments). However, said warship is likely to be of civilian nature (i.e. non-military).

Nuclear-powered icebreaker, maybe?

View attachment 154865
Floating nuclear powerplant ship or nuclear icebreaker

008tJu9Ogy1i0g6smvpb5j31b214k4qp.jpg
 

ACuriousPLAFan

Brigadier
Registered Member
Discussion continued here due to content.

View attachment 154492

New Coast Guard cutter 2503 based of type 52 destroyer on trials in East China sea

Some information regarding the propulsion system of this 052-mod cutter, from SOYO on Weibo in late-March this year:

- High possibility of utilization of CODAG propulsion system (which would be the first amongst non-civilian ships built by China);
- The gas turbine engine is not GT25000/CGT25, but a separate new model; and
- This cutter is likely the first ship to use this new model gas turbine engine.

(Note that the 052D/DG DDGs utilize CODOG propulsion system, not CODAG.)

If the sea trials and subsequent operations of the CODAG propulsion system on this cutter proves to be fruitful and reliable, I think we can reasonably expect CODAG (if not CODLAG as well) to be utilized onboard newer/future PLAN surface combatants.

Provided the rumors/claims by SOYO are true, I think we could see our first CODAG FFGs at the end of this year, at the very earliest.
 
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tphuang

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Discussion continued here due to content.



Some information regarding the propulsion system of this 052-mod cutter, from SOYO on Weibo in late-March this year:

- High possibility of utilization of CODAG propulsion system (which would be the first amongst non-civilian ships built by China);
- The gas turbine engine is not GT25000/CGT25, but a separate new model; and
- This cutter is likely the first ship to use this new model gas turbine engine.

(Note that the 052D/DG DDGs utilize CODOG propulsion system, not CODAG.)

If the sea trials and subsequent operations of the CODAG propulsion system on this cutter proves to be fruitful and reliable, I think we can reasonably expect CODAG (if not CODLAG as well) to be utilized onboard newer/future PLAN surface combatants.

Provided the rumors/claims by SOYO are true, I think we could see our first CODAG FFGs at the end of this year, at the very earliest.

I wonder if there is any reason to use CODOG going forward? At present time, China's technology should be good enough that it can use CODAG everywhere.

actually, they really should go for IEPS everywhere. Idk why for coast guard, they can't just do that.
 
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